Valve-bag



VALVE BAG.

Patented Oct. 19, 1920.

MC. ROSE.

APPLICATION FILED APR. 21,,19I9.

State of Ohio,

UNITED s'rA'pz s gEur OFFICE.

MAXWELL C. ROSE, 0F CLEVELAND, OHIO, ASSIGNOR TO THE CLEVELAND-AKRON BAG- CO., OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

VALVE-BAG.

Application filed April 21, 1919.

To all whom it may concern.

Be it known that I, MAXWELL C. Rosn, citizen of the United States, residing at Cleveland, in the county of Cuyahoga and have invented certain new and useful Improvements in Valve-Bags, of which the following is a specification.

My invention relates to a paper bag or sack having a valve formed in one corner thereof to permit the bag to be filled with any kind. of granular or powdered material, and when filled to be self-closing under the weight and pressure of the contents, especially' when the bag is inverted. Further, the idea is to make a relatively heavy and strong paper bag or sack of large size and capacity adapted to withstand hard usage, and to produce the bag by making only a few simple folds and sealing the folds by the use of paste, preferably by machinery.

In the drawings accompanying this application, Figure 1 is a side view of a bag constructed according to my invention, a portion of the body being broken away to disclose the triangular inner sealing end of the valve of the bag. Fig. 2 is a longitudinal section of the bag on line 22, Fig. 1, and. Fig. 3 is an enlarged sectional view on line 3-3, Fig. 1 showing the folds in he valve portion of the bag. Fig. 4 is a cross section on line M, Fig. 1 showing the bag and its valve folded substantially flat. Fig. 5 is a perspective view of the tube from which the bag is made showing the extended triangular corner as it appears before it is tucked inward to produce the valve.

The invention comprises a bag 2 made of paper or a tough fiber stock folded into a flat tube with an overlapping pasted seam 3 running longitudinally thereof, which tube is out into predetermined lengths on straight transverse lines except at one corner where an angular divergence is made to provide an integral triangular corner extension adapted to form a triangular sealing end 4 for a valve 5. In making the bag, the corner of the tube having extension 4 is tucked or folded between the sides until the longitudinalfold line 6 of the tube is turned at right angles and parallel with the straight end edges 7 of the bag, thereby forming a Specification of Letters Patent.

Patented Oct. 19, 1920. Serial No. 891,438.

straight passage 8 transversely of the tube and which passage is open at both ends with the inclined terminal edges 9 at the inner end sloping reversely to the angular fold llnes 10 at the outer end of the passage. WVhen these folds are completed the end 11 of the tube is pasted inside and outside and folded back upon itself a short distance straight across the bag, thus closing the bag at this end except for the valve passage 8. The opposite end of the bag may be closed by a simple overlapping fold 12 or in any acceptable mode or fashion now practised in making paper bags.

In use, the bag is filled through passage 8 and when the bag is inverted the weight of the contents will collapse the flexible walls of the valve and close the passage, and the triangular extension 4 provides a sealing area of considerable extent inwardly from the mouth or entrance of passage 8 and is easily collapsed and closed at its inner end because this end is free and juts considerably beyond the junction point 14 of the fold where the folds are united together.

From the foregoing description it will be observed that the bag is made preferably of heavy paper tubing cut to the desired length for a bag blank, which has a projecting portion at one end with edges inclined inward and downward from the outer edge of the blank to the straight transverse line on which the blank is severed, the corner of the blank carrying said projection being bent to substantially triangular shape and tucked in between thesides of the blank with the lower edge at right angles to the side edge of the blank and extending approximately half way across the blank intc the same at its point.

What I claim is: e

As a new article of manufacture, a bag made of strong and comparatively heavy paper tubing cut to a length to form a bag blank, and one end of sald blank having a projecting portion with edges inclined inward and downward from the outer edge of the blank to the straight transverse line on which the blank is severed, and the corner of said blank carrying said projection bent to substantially triangular shape and tucked in between the sides of the blank with the lower edge thereof at right angles to the side edge of the blank and extending approximately one-half the Width of the blank into the same at its point, thereby providing a transverse filling opening and valve with an inclined sealing extremity,

and the ends of the blank folded back transversely on the sides thereof and sealed by Spasting.

igned at Cleveland, in the county of 10 Cuyaho a, and State of Ohio, this 5th day of Apri 1919.

MAXWELL G. ROSE 

